Nikon D3100 upgrade - Please reply?

I've D3100 and kit lenses(18-55mm) and 50mm 1.8G. I'm not a pro but I really love photography and planning to do more going forward. I do portrait and landscape photography and I DO NOT take videos. I'm looking for great photo quality. Do I need to upgrade my camera or have to invest in lens? Please advise.

What you have is fine for portraits. Why do you feel you need to 'upgrade'? What is it that you are missing that you don't already have?

If you feel the image quality is lacking, then I'm afraid that's down to the user - that camera/lens combination is capable of stunning portraits.

You might want to study and invest in some off camera lighting. Start off with a single battery speedlight and trigger and see how learning to control the light can make a world of difference to your portraits.

A manual speedlight and trigger needn't cost the earth (you could buy both for around £50) and will give you far more bang for your buck than any 'upgrade'.

Do some research, read some reviews, watch some videos. What you have is capable of great shots. Once you learn how to use that setup, you'll know where your equipment falls short and know what you need to get the desired results. I can tell you that you'll be better served putting money into good lenses instead of upgrading your camera body.

Easy. Without question you need to upgrade your lens. In terms of image quality, the only difference between a D3100 and say, a D4, is the dynamic range and ISO performance. Everything else that one considers image quality has to do with the lens. This why you will get better image quality with a great lens on a D3100 vs a cheap lens on a D4.

Without question, keep your current DSLR and upgrade the lens. To see how other lens compare, go to: http://www.photozone.de/...lens-tests

The only time you should upgrade the body is when it's preventing you from getting the shot or not meeting your needs. But for image quality, that's all in the lens.